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  • Need solution for RD Sharma Maths Class 12 Chapter 24 Vector Or Cross Product Exercise Very Short Answer Question, question 31.

Need solution for RD Sharma Maths Class 12 Chapter 24 Vector Or Cross Product Exercise Very Short Answer Question, question 31.

Answers (1)

ANSWER:

  \pi

HINT:

Use formula \vec{a} \times(\vec{b})=\{-\vec{b} \times \vec{a}\}

GIVEN:

Vectors \vec{a} \times \vec{b} \& \vec{b} \times \vec{a} 

SOLUTION:

Let,

\theta =Angle between two vectors.

We know that

\vec{a} \times \vec{b}=[-\vec{b} \times \vec{a}]

Since cross vector contains \sin _{\theta}

So \sin _{\theta} is always -1 at {\theta}=180 or \pi

Thus \theta =\pi

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